Clear fractions then solve by substitution.
- 
= -18
+ 
= -9
A. {(12, 0)}
B. 
C. {(-12, 0)}
D. ?
Answer: C
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Simplify the expression. ? 23 - 2·4 ?
A. 84 B. 4 C. –15 D. 15 E. 8
Find all the first order partial derivatives for the following function.f(x, y, z) = z(ex)y
A. 
= zyexy; 
= zxexy; 
= exy
B. 
= zxexy; 
= zyexy; 
= exy
C. 
= zyexy; 
= zxexy; 
= zexy
D. 
= zexy; 
= zexy; 
= exy
Solve the problem.For a cone, the formula r = 
describes the relationship between the radius r of the base, the volume V, and the height h. Find the volume if the radius is 10 inches and the cone is 4 inches high. (Use 3.14 as an approximation for ?, and round to the nearest tenth.)
A. 41.9 cubic in. B. 418.7 cubic in. C. 3768.0 cubic in. D. 104.7 cubic in.
Factor completely.48x2 + 28xy + 4y2
A. (12x + 4y)(4x + y) B. 4(3x - y)(4x - y) C. 4(3x + y)(4x + y) D. Prime